Back to EveryPatent.com
United States Patent | 5,341,723 |
Hung | August 30, 1994 |
A reciprocating pneumatic motor for hydraulics has a pair of guide grooves on the inner wall of a cylinder provided, together with a pneumatic piston and a shuttle valve to function pneumatically. The piston has a seal ring which passes the guide grooves to allow air to flow into the shuttle compression chamber, pushing the shuttle valve and opening up a channel for the venting of air. This continuous air flow and venting causes the piston to reciprocate. In addition, the piston is integrated with a ring plate using plastic ultrasound technology which simplifies the structure of the pneumatic motor.
Inventors: | Hung; Michael (9-16, Nan Kan Hsia, Nan Kan, Lu Chu Hsiang, Tao Yuan County, TW) |
Appl. No.: | 049299 |
Filed: | April 20, 1993 |
Current U.S. Class: | 91/224; 60/371; 91/226; 91/290; 92/181P |
Intern'l Class: | F01L 015/12; F01L 025/04 |
Field of Search: | 91/222,224,225,226,229,290,293,294,297,298,299,301,302,307,308 92/181 P 60/371,372 |
3278103 | Oct., 1966 | Juilfs et al. | 91/308. |
3354787 | Nov., 1967 | Takahata | 91/222. |
3561324 | Feb., 1971 | Obergfell | 91/308. |
3597121 | Aug., 1971 | McClocklin. | |
3726185 | Apr., 1973 | Orr | 91/290. |
4028995 | Jun., 1977 | Salmi et al. | 91/298. |
4074612 | Feb., 1978 | Miller | 91/290. |
4352644 | Oct., 1982 | Landrum et al. | |
4645431 | Feb., 1987 | Spencer et al. | 91/297. |